Parry's Penstemon (Penstemon parryi) 1927 by Mary Vaux Walcott, born Philadelphia, PA 1860-died St. Andrews, New Brunswick, Canada 1940 Stock Photo - Alamy
Cha Cha™ Cherry Penstemon | Jackson & Perkins
Penstemon serrulatus (Serrulate penstemon) | Native Plants of North America
Penstemon x digitalis 'Dark Towers' (Beardtongue) – Perennial Farm Marketplace